Ideal Body Weight Calculator

Find your healthy weight range based on multiple scientific formulas.

Your Details

Gender

Height (cm)

Your Ideal Weight Range is

0 - 0 kg

Results from Different Formulas

Hamwi Formula:-

Devine Formula:-

Robinson Formula:-

Miller Formula:-

The Ultimate Guide to Ideal Body Weight

The concept of an "ideal weight" has been a topic of discussion in health and fitness for decades. While the idea of a single perfect number is outdated, determining a healthy weight range is a crucial step in understanding your overall health. An ideal body weight (IBW) calculator is a tool that uses established scientific formulas to provide an estimated healthy weight based on your height and gender. This guide will explore the concept of ideal body weight, the different formulas used to calculate it, and how to use our powerful healthy weight calculator to find your personal range.

How to Use Our Ideal Body Weight Calculator

Our tool is designed to give you a comprehensive result by using multiple formulas at once.

Select Your Units: Choose between **Metric** (cm) or **Imperial** (ft, in).
Select Your Gender: Choose Male or Female, as the formulas differ for each.
Enter Your Height:
- If using **Metric**, enter your height in centimeters.
- If using **Imperial**, enter your height in feet and inches.
View Your Results Instantly: As you input your data, the results on the right will automatically update, showing you:
- A primary **Ideal Weight Range** based on the average of all formulas.
- A detailed breakdown of the result from each of the four famous formulas: **Hamwi, Devine, Robinson, and Miller**.

What is Ideal Body Weight (IBW)?

Ideal Body Weight is a theoretical weight that is considered optimal for a person's height to maintain good health. It's important to understand that IBW is not a single, perfect number but rather a healthy range. It does not account for individual differences in body composition (muscle vs. fat), bone density, or body frame. Therefore, it should be used as a guideline or a starting point, not as a strict rule. A common question people ask is, "what is my ideal weight?", and this calculator provides a scientifically-backed range to answer that.

The Four Formulas We Use to Calculate Ideal Weight

Over the years, several medical professionals have developed formulas to estimate IBW. Our calculator uses the four most widely recognized formulas to provide a comprehensive result.

1. G. J. Hamwi Formula (1964)

This is one of the oldest and most commonly used formulas.

Men: 48 kg for the first 5 feet of height, plus 2.7 kg for each additional inch.
Women: 45.5 kg for the first 5 feet of height, plus 2.2 kg for each additional inch.

2. B. J. Devine Formula (1974)

Originally developed for calculating medicine dosages, this formula has become a standard for IBW.

Men: 50 kg for the first 5 feet of height, plus 2.3 kg for each additional inch.
Women: 45.5 kg for the first 5 feet of height, plus 2.3 kg for each additional inch.

3. J. D. Robinson Formula (1983)

This formula is a modification of the Devine formula.

Men: 52 kg for the first 5 feet of height, plus 1.9 kg for each additional inch.
Women: 49 kg for the first 5 feet of height, plus 1.7 kg for each additional inch.

4. D. R. Miller Formula (1983)

Another modification, this formula often yields slightly higher results.

Men: 56.2 kg for the first 5 feet of height, plus 1.41 kg for each additional inch.
Women: 53.1 kg for the first 5 feet of height, plus 1.36 kg for each additional inch.

Our IBW calculator shows you the result from each of these, giving you a clear understanding of why a "range" is more useful than a single number.

IBW vs. BMI: What's the Difference?

While both are used to assess healthy weight, they are different tools:

Ideal Body Weight (IBW): Provides a *target weight* to aim for based on height and gender. It's a prescriptive measure.
Body Mass Index (BMI): Uses your *current weight* and height to give you a score that places you in a category (Underweight, Normal, Overweight). It's a descriptive measure of your current status.

Often, the healthy weight range calculated by an IBW tool aligns closely with the weight range that would give you a "Normal" BMI.

Frequently Asked Questions (FAQ)

Why is there a range for ideal weight?

Because there is no single "perfect" weight for any given height. Factors like body frame size (small, medium, large), muscle mass, and genetics mean that two people of the same height can have different healthy weights. Using multiple formulas provides a realistic and achievable range.

Does this calculator work for children?

No. These formulas are designed for adult men and women. Children's weight should be assessed using age- and sex-specific growth charts and percentiles, typically by a pediatrician.

Is this tool a substitute for medical advice?

Absolutely not. This weight calculator is for informational purposes only. It does not provide medical advice. Always consult with a doctor or a registered dietitian before making any significant changes to your diet or exercise routine.

Conclusion

Determining your ideal body weight is a positive step toward setting and achieving health and fitness goals. Our **Ideal Body Weight Calculator** offers a comprehensive and nuanced perspective by using four different scientific formulas, providing you with a realistic and healthy weight range to consider. Use this tool as a starting point to understand your body better and to have more informed conversations with healthcare professionals about your personal health journey.